A method for preparing electrocatalytic gas diffusion electrode by using waste tires
A gas diffusion electrode, waste tire technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems of waste tire environmental pollution, high cost of cathode materials, and achieve high environmental value , large application value, high oxygen mass transfer efficiency
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Embodiment 1
[0029] Nickel mesh (200 mesh) was cut into a size of 4cm*4cm, ultrasonicated in deionized water for 30 minutes, and dried at 80°C for 1 hour (this is the pretreatment process of the nickel mesh used for tableting). A mixture of 0.2 g waste tire carbon, 0.2 g carbon black, 1 mL polytetrafluoroethylene dispersion (Aladdin, 60 wt. %) and 10 mL ethanol was ultrasonicated for 30 min, and then heated and dried at 80° C. until paste. Take the above-mentioned paste and roll it into two small balls of uniform size for tableting, place one of the small balls in the center of the nickel mesh, and press it evenly for 2 times through the tableting machine, then turn the nickel mesh over and use another small ball Press another layer (also uniformly pressed twice), wherein the tableting pressure is 15MPa, the tableting time is 18s each time, and the hot-pressing temperature is 60°C. After the pressing is completed, put it into a muffle furnace for roasting, the roasting temperature is 350 °...
Embodiment 2
[0031]After the waste tire charcoal was sorted by a 300-mesh metal sieve, 5g of the sorted waste tire charcoal was weighed and added with 250mL of 12M concentrated nitric acid. After being refluxed and acidified by a distillation device for 1 hour, it was naturally cooled and filtered with suction, and 100mL of ethanol and 100mL of distilled water were used successively. Washed to neutrality and dried at 70°C to obtain acidified tire charcoal. A mixture of 0.2 g of acidified tire carbon (acidified for 1 h), 0.2 g of carbon black, 1 mL of polytetrafluoroethylene dispersion (Aladdin, 60 wt. %) and ethanol was sonicated for 30 min, and then heated and dried at 80° C. to paste. Get the above-mentioned paste and rub it into two even-sized small balls to be tableted, place one of the small balls in the center of a nickel mesh (nickel mesh pretreatment process, the same as in Example 1), and evenly press it 2 times through a tablet press ( It is hot pressing), then the nickel mesh is...
Embodiment 3
[0037] After the waste tire charcoal was sorted by a 300-mesh metal sieve, 5g of the sorted waste tire charcoal was weighed and added with 250mL of 12M concentrated nitric acid. After being refluxed and acidified by a distillation device for 3 hours, it was cooled naturally, filtered with suction, and successively used 100mL of ethanol and 100mL of distilled water. Washed to neutrality and dried at 70°C to obtain acidified tire charcoal. A mixture of 0.2 g of acidified tire carbon (acidified for 3 h), 0.2 g of carbon black, 1 mL of polytetrafluoroethylene dispersion (Aladdin, 60 wt. %) and ethanol was sonicated for 30 min, and then heated and dried at 80° C. to paste. Get the above-mentioned paste and rub it into two even-sized small balls to be tableted, place one of the small balls in the center of a nickel mesh (nickel mesh pretreatment process, the same as in Example 1), and evenly press it 2 times through a tablet press ( It is hot pressing), then the nickel mesh is turne...
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